Apparatus for printing on waxed paper and the like



G. H. PETRI.

APPARATUS FOR PRINTING 0N WAXED PAPR AND THE LIKE.

APPLICATION FILED JAN. 16. I918.

1,387,941 Patented Aug. 16, 1921.

2 SHEETSSHEET 1.

G. H. PETRI.

APPARATUS FOR PRINTING 0N WAXED P AND THE LIKE.

APPLICATION F|LED'JAN.16.

1,387,941 Patented Aug. 16, 1921.

ZSHEETS-SHEET 3TH= UNITED STATES PATENT 7 omen.

. eumnna 1:. mm, or Broom, massacnusnrrs. mm-rusroa ramrme ouwsxnn rerun AND mm m Specification of Letters Patent. Patented Aug-.16, 1921.

Application mea'nmuar 16, ms. Serial No. 212,004.

To all whomz't may concern:

Be it known that I, "Gimzrrmn-H. Pram, a citizen of the United States, residing at Brookline in the county of Suffolk and State of Massachusetts, have invented new and useful Im rovements in Apparatus for Printing on axed Paper and the like, of which the following is a specification.

This invention relates" to printing on waxed paper and the like. The invention is illustrated as it may be applied in connection with waxed waxed paper used for other purposes, and to other varieties of coated or treated paper in which the treatment is such as to preventsuccessful direct printing on the treated paper.

' In the preparation of printed waxedjpaper and the like,'as now manufactured, it:- variably necessary as far as I am-a print the paper before it is coated wit 1 waterproof, germproof or other which gives it its characteristicfut after the paper has been so coated no ther printing upon it can be done-T are several disadvantages in this,lon manifest at the present time whe erable stocks of prepared paper are hands of bakers, ready printed with' of the loaves that were to be packed ther but which have been rendered unsuitable'by' reason of the order of the food'administrator changing the standards as to thefpermissible weights of loaves. It is one object. of the invention to provide means by which these prepared wrapping papers can be utilized, by being reprinted wlth a corrected weight, according to the new standards with which they will be used. In making articles such as envelops and bags of coated paper it is most economical to coat the paper while it is in strip form,-before being made u into the envelops; but when it is desired that printing on the paper shall register at a par there isexpense',

ticular place on the envelop in making the difliculty and some waste,

printing previously done on the strip reg-- ister on the envelop. It is therefore another object, attained by the inventlon, to provide a process by which printing can be doneupon made-up articles of wax paper. '{It is a further ob'ect to introduce economy, and expedition, and to reduce the investment of capital required, in the manufacture of waxed that th paper used for wrapi plng loaves of bread, but it is applicable to .tive and least "expensive. speaking generally, is to soften temporarily paper and the like, ewaxed paper can be waxed in quantity .in blankform, and then can be printed with its various devices as wanted, llttle by little, without" thej necessity of doing the prlnting before the waxing, and so breaking .preferred asseemiiig to be simplest and most by providing so I up the waxing operation into small indifinished in its re su'lts as well as being eifec- The process,

the wax that coats the fibers and fills the inliquidi-stateil iand then while it is in E liquid stateto.

si-on typejr he fluid wax and the more ap ly ink thereto by impresrless fluid ink intermingle, and the ink thus accessto the fibers of the paper, along eswhich the impression is made,

soaksinto them and produces its printg eife'ctltliereon; and such parts of itas onotreach-fthe fibers of the paper are im- .-atained, both by the ink getting p structure of the paper and by the ink in "rmingling with the wax below the surface, coloring it, and being held there .that the process works well when heat is the softening agent; it appears that the process might be practised by the use of a solvent such as alcohol which may be applied along a path in which the printing is immediately afterward to be done. In this case the ink mingles with the wax and the fibers, as before, and is held imprisoned upon evaporation of the solvent.

-,Apparatus used in practising the process l' pri'sonedbyfthe hardening of the wax which immediatelyj 'xf ollows, so that the effect of printin may take the simple form of a heated printing roll adapted to run on the paper just before the paper goes into the machine where it is to be cut and folded around the bread. This statement illustrates another field of its utility, for when so used 1t can, if desired, mark the date or hour on the wrapper, the print wheel being changed as necessary, thus being a field which could not be entered satisfactorily by pro-printed paper without great waste. The apparatus may bear upon the supply roll of paper, applymg to it the heat or solvent in advance of'the roll applying the ink. Means for applying the apparatus to a wrapping machine in which the waxed paper is used, and for adjustment of various parts to each other and to the wrapping machine, may be rovided and are more fully described hereinafter. The invention may be embodied in various forms of apparatus, and the process may be practised in variations from the precise form here described and illustrated. It is intended that the patent shall cover by suitable expression in the appanded claims,

whatever features of patentable invention are here disclosed. In the accompanying drawings,

Figure 1 is an elevation of apparatus for practising the invention viewed from the side of the course of paper that is being printed, unrolled and moving toward a. wrapping machine.

Fig. 2 is an end elevation, looking in the direction of travel of paper;

Fig. 3 ice plan;

Fig. 4 is a section of a detail, with the pipe and as flame therefrom represented as having on rotated from its position at Fig. 1 into the plane of section;

Fig. 5 is a side elevation of a modified form of apparatus;

Fig. 6 is a plan of the same;

Fig. 7 is a side elevation of a detail of the printing type; and

Fig. 8 is a plan of the same.

Referring to the drawings 10 indicates a supply roll of waxed paper. This may, for example, be half a yard in diameter and may consist of a strip of paper half a yard wide, or of such other size and width as conbe wrapped in the bread wrapping machine,

whose location is indicated by one bar 11 of its frame but which is not otherwise illustrated.

The numeral 12 indicates a printing roll adapted to press upon the paper strip. As

illustrated in Fig. 1, the paper that is being printed is the outslde layer of the supply' roll, this thickness of pa er being supported by the body ofthe r0 and the printing is done by the action of heat and ink conveyed simultaneously to the paper from the roll 12. This roll gets its supply of heat through the flame 13 of a Bunsen burner fed by a pipe 15 and controlled by a cook 16; and gets its supply of ink from an inkin roll 17 having an ink-bearing body of fe t 18. The axles of the rolls 17 and 12 are mounted on pivoted arms, so that they can swing down around a fixed pivot 19 following down the diminishing diameter of the supply roll 10 as paper is drawn therefrom to be consumed. As illustrated in the drawing there is a fork 20 holding the inking roll 17, and another fork 21 holding the printing roll 12. Both are loose on'the pivot 19 which is a horizontal section of gas pipe from one of whose ends the arm 15 swings with an ordinary gas pipe pivoted elbow. The other end of pipe 19 may be closed by 'a cap 23. Gas reaches the pivot 19 through a vertical supply pipe 22 which serves also as a support for the apparatus above described. The whole printing and heating apparatus thus described is attachable to the frame 11 of a wrappin machine'by a bracket 24, wherein'it may fie adjusted and made fast at the desired horizontal distance by a clamping screw 25; and it can be set and held at the desired vertical elevation by a bracket and screw 26 holding the upright pipe 22 which receives its supply of gas through a tube 27 whose flexibility favors adjustment of elevation at will. The rolls l7 and 12 are so arranged as to beheld down by gravity or other suitable force, roll 17 on the roll 12, and the latter on the'paper that is to be printed. A fork 28 at the end of the axle 29 of the printing roll 12 engages some suitable part of the gas pipe and arm 15 and causes that to swing up and down with the roll 12.

When the process is practised by means of apparatus thus far described, the roll 12 presses down on-the roll 10 and rolls on the surface thereon the strip of paper which is about to be drawn'off. As fresh parts of the roll 12 come into contact with the paper surface, they transmit thereto enough heat to melt wax thereon along the lines where the printing roll 12 comes in contact with the paper, which lines are'the crests of the type formations thereon. The heat of the roll 12 is thus used economically, except of course such as passes off by radiation, because that heat is used in melting wax only at the specific narrow lines where the new ink impression is to be; and only so much posited by it may do its work owing the flux produced by the solvent. If the 1 and 2 where a roller 30 is'shown adapted to (press against the main supply roll and to eposit upon it a suitable liquid such as alcohol, from bath or reservoir 31, and so make a reliminary softened zone of wax upon which the printing roll 12 runs and does its work. The lapse of time between the application of liquid and the incidence of the type roll ives opportunity for the wax to be softened more deciply by the heat of the printing roller 12. owever, if the printing roller be not heated the ink dcroller 12 be heated its heat helps hasten the evaporation of the solvent after the ink has been deposited from its own surface, and also helps (1 leaving the prints paper equally ry and ready for immediate use.

Figs. 5 and 6 illlustrate another apparatus for performing the process in which a heating roller 32, mounted like the heating roller 12 as represented in Fig. 1, has a flat surface, as seen m Fig. 6, and applies heat to a zone of the supply roll somewhat as the roller 30 applies a solvent to a zone thereof, within which zone the printing roll 33 tracks and does its work immediately afterward. The impression of heat, solvent, or ink is not necessarily made directly against the supply roll as-a bed. Figs. 5 and 6 show a plate 34 over which the paper passes from the supply roll 10 and on which 1t receives its printing. In order to provide for continuous operation regardless of the diameter of the supply roll, the heating roll 32 and the printing roll 33 and the inking roll 35 are represented in Fig. 5 as being mounted on pivots which permit them to follow down the diminishing size of the supply roll; and the printing bed plate 34 1s pivoted, as at 36, and is pressed upward by the spring 37 which lifts it when the roll 33 is raised. When the roll 33 presses down upon the bed 34 the latter is supported by the roll 38 at its free end, which rests on the surface of the supply roll and so swings down with the diminishin size of the, supply roll.

hen liquid is used as in Fig. 1 for. distribution through roll 30 to the underside supply roll of of roll 10, the roll 30 may automatically follow upward the diminishing size of thesupply roll, by use of a device such as the socket ,39 and sprin 40 therein illustrated, in Fi 1 and 2, w ich maintain the bath 31 an roller 30 pressed upward against the aper 10, whatever be the diameter'thereoii The spring 40 is coiled about the spindle 41 and fits'rather closely within the socket 39. The upper end of the spindle projects into the bottom of the container for the liquid 31, and holds it stifliy upright; and the bottom end of the spindle passes up .or down as needed through the the ink quickl thus ed to bottom of the socket 39, being steadied by the hole therein and the spring-surrounding 1t or by such other means as may be advlsable.

Flgs. 7 and 8 show a style of type that maybe used, and illustrate how the transmlsslon of heat from the roll 12' to the aper may be concentrated on the precise lnes wh1ch car ink, for these lines are ralsed above the od of the roll and so are the only parts'of t e .roll that touch the paper. a

claim as my invention 1. A printing device for composite fabric having a printable core fabric and non-absorbent coating, comprising a holder for the fabr c, adapted for the fabric to move forward; and means acting on the fabric to modlgy temporarily the coating along a restrlcte area; combined with means registerm therewith for printing through the modi ed coating upon the core.

2. Apparatus for printing on non-absorbent fabrlc comprising a printing roll adapted to press thereon, an ink sup l'y rol l adapted to press on the printing rol means to mount sa1d rolls on the frameof a mechanism in which a supply of the fabric is held; a gas burner arranged to heat saidprinting roll; and a pipe, conducting gas to said burner and constituting a support for said printing roll.

3. Apparatus for printing on non-absorb ent fabrlc comprising'a printingroll adaptpress thereon; a swinging su port for the rinting roll. whereby said rolll can follow t e change of position of fabric that is being drawn from a supply roll; and a gas burner for heatin sa1d printing roll,

mounted pivotally sot at it can movewith the printing roll.

4. Apparatus for printing on non-absorbent fabric comprising a gas ipe'and means to hold it rigidas a'stan ard; a T-head therefor, constituting a pivotal support and also a continuance of the gas passage; arms swinging therefrom; ,and a printing roller and cooperating gas burner supported by said arms.

5. A printing device for composite fabric having a printable core fabric and a non-absorbent coating comprising a holder for the fabric adapted for the fabric to move forward; and means comprised in one element for operating on the composite fabric at a single contact with separate processes,

one for modifying the coating and the other for printing on the core. 1

6. A printing device for composite fabric having a printable core fabric and a nonthe fabric to move forward; a printing roll adapted to rest on the fabric; means to ink said roll and means to heat said roll liminary to its contact with the fa ric,

.125 absorbent coating, comprising a holder for whereby upon contact the heat modifies the coating and the ink prints the core.

7. Apparatus for printing on non-absorbent fabric, comprising means to hold a roll of said fabric, combined with a gas pipe adjacent to the top of the roll; and a printin roller and a burner for heating the r0 er, both being pivoted on said gas pipe and the roller being adapted to rest down by gravity on said roll of fabric, swinging 10 downward on said pivot as the roll of fabric diminishes. 3

Signed by me at Boston this 12th day of January 1918.

GUNTHER H. PETRI. 

